Dreams of a cyberpunk future where the sum total of the world's knowledge of any subject can be just a thought away
Most likely reality:
Popup ads are now intrusive thoughts. 40 percent of your implant's processing power is spent looking for cues in your environment to better serve you "curated content" (i.e. advertising). Knowledge is still somewhat freely available but just after this quick shout out to our sponsors.
When you're looking for something specific it's a coin toss whether you get actual knowledge or an AI hallucination and you can't tell the difference. You can pay $279.99/mo for premium access to verified sources, but if your licence expires you forget everything.